In November 1913, Skookum was sunk in a collision with Castlegar between Trout Creek and Penticton, leading to the injuries of three men.[3]
The captain of Castlegar at the time was J. Fitzsimmons and the chief engineer on board was G. Smith.[2]

After 12 years of service on Okanagan Lake, the tugboat was retired in 1925. The engines salvaged from Castlegar were used in Roseberry.[2]